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Ferroelectric thin films for memory and MEMS applications require noble metal or refractory metal oxide electrodes. In this paper, physical and chemical mechanisms during platinum etching by a dual frequency ECR/RF reactor have been investigated. An ion be ...
The syn-anti ratio of 7-(R-substituted)-norcaranes (I, R = Ph. F, Cl) formed in the cycloaddn. of cyclohexene (II) with PhCH2F, PhCH2Cl, PhCHBrF, PhCHBr2, FCHBr2, ClCHBr2, or CH2Cl and BuLi in various solvents under N was examd. with respect to influences ...
(Z)-(3,3-dimethylbicyclo[2.2.1]hept-2-ylidene)methyllithium can be readily generated by treatment of (Z)-3-bromomethylene-2,2-dimethylbicyclo[2.2.1]heptane with Me3CLi. At -75 Deg, the organometallic intermediate is configurationally stable and reacts with ...
2- And 4-Fluoroanisole undergo hydrogen/metal exchange at the position next to the alkoxy moiety if n-BuLi or tert-BuLi is used and at the position next to the halogen atom if the stoichiometric mixt. of butyllithium and potassium tert-butoxide serves as t ...
A dimeric composition of the formula: wherein L', L'', L''', and L'''' are each a bidentate ligand having at least one functional substituent, the ligand selected from bipyridine, phenanthroline, 2-phenylpyridine, bipyrimidine, and bipyrazyl and th ...
When treated with tert-butyllithium in THF at -50 Deg, N-BOC (tert-butoxycarbonyl) protected fluoroanilines and trifluoromethylanilines, e.g., o-, m-, or p-F3CC6H4NHCO2CMe3, undergo metalation at the position adjacent to that carrying the nitrogen. If, how ...
Bromine contg. compds. are thought to play an important role in the O3 destruction in various regions of the atm. Recent studies of atm. Br chem. suggest that HOBr is one of the important Br compds. The rapid photolysis of HOBr in daytime releases Br atoms ...
Ferroelectric capacitive devices for memory and MEMS applications require patterned ferroelectric thin films with high anisotropic etched features. In this paper, physical and chemical parameters during etching of Pb(Zr0.53Ti0.47)O-3 (PZT) by a dual freque ...
The heterogeneous reactions of NO3 on NaCl and KBr salt were studied at room temp. using a Knudsen reactor equipped with dual detection, namely Laser induced fluorescence and mass spectrometry. The uptake coeffs. of NO3 were g=(4.9+-3).10-2 onto NaCl and g ...
A photog. material with improved physicomech. properties and photog. characteristics contains a combination of gelatin and a water-sol. polymer in the form of a symplex. Thus, a cellulose acetate support was coated with a coupler-contg. Ag(Br,Cl,I) (15 mol ...
